Get Default Version Set to Build on Fedora 33

• building in /scratch/gdvs
• lapack: 3.6.0 -> 3.9.0
• root: 6.08.06 -> 6.18.04
• ran 2to3 on a couple of SConscripts in halld_sim
  • created branch “python3_syntax_on_print_MMI” of halld_sim with changes
  • did this wrong the first time, amended version “python3_syntax_on_print_v2_MMI” was used to create a pull request and it was merged.
• removed an include of complex.h in one of Elton’s AmpTools projects
  • created branch “no_complex.h_with_root_includes_MMI” with this change
  • but wait: for some reason this change is no longer needed. not sure why. closed the pull request before it was merged.
• after the aforementioned two branches get merged, need to tag a version with upgraded lapack and root
  • will need a dirtag’ed cernlib